OSISKO METALS LAUNCHES DEEP PORPHYRY EXPLORATION PROJECT (“DPEX”) AND CONFIRMS 852 METRES AVERAGING 0.95% CuEq AT HISTORIC PORPHYRY MOUNTAIN DEPOSIT

Plan View Long Section (Montreal, February 5, 2026) Osisko Metals Incorporated (the “Company” or “Osisko“)  (TSX: OM; OTCQX: OMZNF; FRANKFURT: 0B51) is pleased to announce initial results from the start of the re-evaluation of the Gaspé Copper Project’s (the “GCP”) Porphyry Mountain deposit, discovered in 1994 by mine-site exploration work conducted by Noranda Inc. Osisko’s…